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DC2663A: 7.5mA, 4.2V Low Power Wireless Charger Demonstration Kit

Summary

DC2663A is a Demonstration kit of the DC2662A receiver board, featuring the LTC4126EDC, the DC2661A single switch transmitter board featuring the LTC6992 and the DC2687A application-sized receiver board featuring the LTC4126EDC. The DC2662A can charge a single Li-Ion battery at up to 7.5 mA with an air gap of 2.0 mm to 4.0 mm.

The LTC4126 is a low-power wireless single-cell Li-Ion battery charger with an integrated step-down DC/DC regulator. The step-down regulator is a low-noise multimode charge pump which is powered from the battery and provides a regulated 1.2V at the output. The switching frequency is set to either 50kHz or 75kHz depending on the mode to keep any switching noise out of the audible range.

The LTC4126 charger is a full-featured constant-current constant-voltage Li-Ion battery charger with automatic recharge, automatic termination by safety timer, and battery temperature monitoring via an NTC pin. Charge current is fixed at 7.5mA with a 6-hour termination timer. Under voltage protection disconnects the battery from all loads when the battery voltage is below 3.0V.

The LTC6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox family of versatile silicon timing devices.

Specifications

Manufacturer Linear Technology/Analog Devices
Category Power Management
Sub-Category Battery Chargers
Eval Board Part Number DC2663A-KIT-ND
Eval Board Supplier Linear Technology/Analog Devices
Eval Board Normally In Stock
Cell Type Lithium Ion, Li-Ion
Configuration 1 Cell (Li-Ion)
Voltage In 2.7 ~ 5.5 V
Voltage Out 4.2 V
Current Out 7.5 mA
Features Auto Off
Auto Re-Charge
Cell Temperature Monitoring
LDO Regulator(s), On-Chip
Over Voltage Protection
Shutdown, Enable, Standby
Under Voltage Protection, Brown-Out
Quiescent Current [Typical] 50 µA
Sleep Mode Current [Typical] 4 µA
Component Count + Extras 27 + 28
Application / Target Market Computer Peripherals
Medical
Portable Devices
Wearable Devices
Design Author Linear Technology
Main I.C. Base Part LTC4126
LTC6992
Quiescent Current [Maximum] 80 µA
Sleep Mode Current [Maximum] 8 µA
Date Created By Author 2018-01
Date Added To Library 2019-07

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